According to the empirical rule, z-scores of less than -3 or greater than 3 occur very infrequently
for data from a mounded and symmetric distribution

Question

Quizplus · Accepted Answer

The empirical rule, applicable to a normal distribution, states that about 99.7% of data falls within three standard deviations from the mean, making z-scores less than -3 or greater than 3 very rare occurrences.

According to the Empirical Rule, Z-Scores of Less Than -3